Automobile heater



G. E. BLAKE oct. 25, 1932.

AUTOMOB I LE HEATER Original Filed March 2l, 1929 Patented Oct. 2 5, 1932 lUNrr-E-D STATES PAT,Ell-1v1?y oFF-lice 'g enormen n. BLAKE, oREAsr AURORA, NEW YORK, AssIGNoa To FORSYTHE MnrALvGooDs y COMPANY, INc., or Vnesr AURORA, NEW YORK, A CORPORATION or NEW YORK AUTOMOBILE HEATER v Original 'application tiled March 21, 1929, Serial No. 348,798. Divided and this application led April 30,

1930. Serial No, 5485181.

This invention relates to aheater and more particularly to an automobile exhaust heater in which the heat from the exhaust gases ol'A the automobile engine Yisutilized for heating 5 ythe interior of the car, although the invention can also be vemployed in other analogous uses.

Thisapplication is a division of my application for patent, Serial No. 348,798, liled March 21, 1929, which has since matured into 1o Patent No. 1,811,816', dated June 23, 1931,

*15 adequately andeioticiently heat the interior of the car and which isadjustable to tit all standard automobiles, and in which the heater can be applied Without taking apart any of the engine connections and particularly the ex- 1120 'haust pipe on which the heater casing is adapted to bev mounted.

A `further object is to provide a heater of this character which can be applied to curves or bends in the exhaust pipe as readily as ,25 straight portions thereof, such bends or curves frequently 'occurring at the only convenient place Where the heater can be installed.

A further purpose is to .provide such a he ater Whichcan be installed quickly and readily e and in Which the adjustments required to lit the `heater to dilierent cars can be performed quickly and require no special skill.

Another aim' is to provide a heater which when yinstalled on the car Will not be affected bythe vibration to which automobile accessories are necessarily subjected and will operate to :provide an abundant supply of hot air when needed.

Still further objects are to provide such a heater vwhich is simple and inexpensive in f constructionand in which there is no danger ,of exhaust gases being conducted to the interior of the car by the stream of heated air.

lnv the accompanying drawing:

Fig. 1 is a side elevation of a heater embOdyin-g the present invention installed on ythe exhaust pipe of an automobile and 'show-y ing the arrangement of the cold air inlet and the hot air outlet.

Fg. 2 is a longitudinal lsectlonthrough the heater casing orbody,the inlet and outlet connections having been removed.

Figs. 3 and 2l are transverse sections taken on the correspondingly numbered lines in Fig. 2.

Figure 5 isv an enlargedfragmentary fsection similar to Fig.A 4 showing a slightly modilied form of the invention. i i Similar reference numerals `refer to similar parts in each of the figures ofthe drawing.

In its general Organization this inventionr comprises a heater body composed of two half sections of a piece of flexible metal tub; ing, a separable head at each end ofthe tubing, the end heads being adapted'to be litte'd to an exhaust pipe means for holding 'the several members together and in fixedl relation to the exhaust pipeand cold fair inlet and Warm air outlet, connections iviththe separable end'heads.

ln Fig. 1 is illustrated an automobile motor having the usual exhaust manifold and exhaust pipe 1l leading from this manifold, the exhaust pipe being shown as having a curve Where the heater is applied.

The body of the heater is composed of two sectionsy 12 and 13 of V)flexible metal tubing.

This tubing is fabricated in the usual manner from a strip of metal Which is helically Wound, the edges ot the several turns of the Vstrip 4being interlocked so that a substantially tight tube is provided andl at the same time the tube is `flexible, theinterlocking being so yettected as to permit the strips to slide relatively to one another and ypermit the tube to be flexed in any desired direction.

After being so fabricated the flexible metal tube is cut lengthwiseso as to form the tWo sections 12 and'l, and ,the edges 'of one or both of the sections may be-os'et, as indicated at 14 in Figs. l and 5 so that upon joining these sections a tight joint is effected between them and the sections are prevented from col-y lapsing. In addition to offsetting the edges of the llexible tube `sections 12 and 13 half round angle pieces 15 can be Welded or other- Wise suitably secured to the channel section the edges of `the male section engaging the Y. e

Y Ythe two sections are brought together.

To the opposite ends of the flexible metal tube sections an inlet head 16 and an outlet head `17 are secured, the inlet head being provided `with anA inlet 18 and the outlet head .provided with an outlet 19. Inasmuch gs these heads pre alike in construction and mounting, the following description of onev will be deemed to apply to both.

Each head is composed of two semi-cylin-m drical sections 20 and 21 which are made of sheetmetal or the like, and tothe end of each section 20 and 21 and end wall 22 is secured, each end wall 22 having a semi-circular opening 23. The end Walls 22 are made of sheet metal of low tensile strength and are formed to Aprovide an inwardly projecting semi-circular flange 24 which is welded to the corresponding head section 20 or 21. The two sectiorisf20 and 21 together with the end walls 22 are adapted to be joined together and for this purpose the opposing edges of each section 20 and 21 are offset as indicated at 25 i 4in' F ig; 3 and are provided with corrugaltions 26 which limit the inward movement of the two sections. By this means one section, the section 20, is litted within the other section, the corrugation 26 forming a stop for limiting the inward movement. The end wall 22 of the female section 21 is also preferably formed to provide inwardly offset vportions 27 at its endswhich are adapted to en ge the inner sides of the ends of the end Wali 22 of the male section 20 and provide a leak-tight joint at this place.

The inlet or outlet 18 or 19 can be secured to either of the sections 20 or 21 in any suitable manner and as shown an opening is provided in the section 2O and the end of the inlet or outlet is flanged and welded to the inside of the section.

In installing the heater as described the two flexible metal tube sections 12 and 13 are brought together around the part'of the exhaust pipe to which the heater is to be applied and the end heads are then brought together so as to embrace the ends of the sections 12 and 13 of the flexible metal tube. The several sections are then clamped together by a plurality of straps 28, the ends of which are adapted to be .drawntogether by bolts 29. Preferably three of such straps 28 are provided, one embracing each end head and the other embracing the two sections of the Hexible metal tube at the center of the heater.

To permit of the heads being fitted to exy walls 22 of each end head section is made of metal of low tensile strength and is provided on its inner and outer sides with a plurality of grooves or indentations 30 which are arranged concentrically with the exhaust pipe o ening 23 as best shown in Figs. 3, 4 and 5.

he"corresponding indentations on opposite sides of each of the end walls 22 are equidistant from the exhaust pipe opening and therefore form thin webs connecting relatively thick beads 31. The beads 31 of the corresponding walls 22 are registered with Forl/2 exhaust pipe use present hole; F or 15/8 exhaust pipe remove l ring; F or 1% exhaust pipe remove 2 rings; For 17/8 exhaust pipe remove 3 rings; For 296 exhaust pipe remove 4 rings;

The beads 31 are readily torn from the Walls 22 by gripping the ringssuccessively with a pair of pliers and tearing the web connecting it to the next bead.

The cold air'inlet for the inlet connection for the heater as described and the hot air outlet may be of any suitable form and as shown, the cold air inlet connection comprises a. iexible metal tube 32 which is connected to the cold air inlet 18 in any suitable manner and at its outer end is connected to a channelshaped air collector 33. This collector 33 is preferably mounted adjacent the radiator of the automobile so that a part of the passing air is forced into the cold air inlet tube 32 and into the heater. In a similar manner a fiexible metal hot air outlet conduit 34 is secured to the outlet 19 and at its other end is connected to a register 35 which discharges the hot air into the car body. It is apparent that the air passing through the heater is brought into intimate contact with the exhaust pipe which the heater surrounds and is therefore heated before being discharged through the register 35. v

By employing two sections of iexible metal tube, as described, in combination with separable end heads it is obvious that the present heater can be applied to'exhaust pipes without disconnecting or dismantling the exhaust pipe in any way, the several sections being merely brought together and clamped in place. It is also apparent that by employing sections composed of flexible metal tubing that the heater casing can be bent or turned into any desired formv and that therefore the heater casing can be applied as easily to curves in the exhaust pipe as indicated in Fig. l as well as straight portions thereof. Also by osetting the edges of the two flexible metal tube sections l2 and 13 a tight joint is obtained between these sections and this oli'- setting also tends to prevent the strips composing the flexible metal tube sections from coming apart.

It is also apparent that the iiexible metal body tubing portion can be slitted or split on one side only and the opposite side weakened to provide a hinge which permits the two sections or sides of the flexible metal tubing to be spread apart to receive the exhaust pipe and then brought together to form the completed heater body.

This heater is also inexpensive and simple to construct and install, it can be quickly applied to all makes of cars and when applied is not liable to become loose or to lose its eiiciency due to the severe vibration to which it is subjected.

I claim as my invention:

l. In combination with means for creating a current of a medium to be heated, a heater of the character described, comprising a flexible metal tubing body portion split longitudinally at at least one side to form two sections adapted to be joined together, said tubing being formed of a helically wound metal strip, the several convolutions thereof being interlocked at their edges, the break between said sections extending longitudinally from one end to the other, means for enclosing the ends of said joined sections and means for conducting said medium to be heated through said joined sections.

2. In combination with means for creating a current of a medium to be heated, a heater of the character described, comprising a flexible metal tubing body portion split longitudinally at at least one side to form two sections adapted to be joined together, the break between said sections extending longitudinally from one end to the other, and the edges of said sections at the break being oiset to provide an interiitting joint at the break, and means for conducting said medium to be heated through said joined sections.

3. In combination with means for creating a current of a medium to be heated, a heater of the character described, comprisinga flexible metal tubing body portion split longitudinally at at least one side to Jform two sections adapted to be joined together, said tubing being formed of a helically wound metal strip, the several convolutions thereof being interlocked at their edges, the break between said sections extending longitudinaliy from one end to the other, and the edges of said sections at the break being oiset to provide an interitting joint at the break and means for conducting said medium to be heated through the joined sections.

4. A heater of the character described, comprising a flexible metal tubing body portion split longitudinally at at least one side to form two sections adapted to be joined together, said tubing being formed of a helically wound metal strip, the several convolutions thereof being interlocked at their edges, the break between said sections extending lon-j gitudinally from one end to the other and the edges at the break being oiset to provide an interfitting joint at the break, a head at each end of the body, each of said heads being composed of two separable sections, and an inlet in one of said head sections and an outlet in another of said head sections and means embracing said body and heads and holding the same together.

5. In combination with means for creating a current of a medium to be heated, a heater ot the character described, comprising two flexible semi-cylindrical metal sections each composed of a plurality of semi-circular metal strips having their corresponding edges interlocked, said sections being adapted to lit around a heating element and having their longitudinal edges oiiset to intertit and form a flexible cylinder and means for conducting a medium to be heated through said cylinder.

In testimony whereof I hereby aiix my signature.

GEORGE E. BLAKE.

IOT) 

